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More on ANOVA

Power of Within-Subjects Designs Demonstration

Answers

  1. High correlations can result in much higher power than lower correlations. They do this by lowering the mean square error.

  2. High variance increases the error term and lowers power.

  3. The more different the population means, the bigger the effect and the higher the power.

  4. Since the probability is caluclated in only one tail, a one-tailed test results in a lower probability value.

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  • line 7292 of /lib/moodlelib.php: call to {closure}()
  • line 71 of /lib/classes/hook/output/before_footer_html_generation.php: call to get_plugins_with_function()
  • line 987 of /lib/classes/output/core_renderer.php: call to core\hook\output\before_footer_html_generation->process_legacy_callbacks()
  • line 97 of /mod/book/tool/print/index.php: call to core\output\core_renderer->footer()